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Summary of shares of common stock issued (Details) - Common Stock [Member] - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2023 | Oct. 31, 2023 | Apr. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Shares, Outstanding, Beginning Balance | 55,541,875 | 54,568,065 | 53,748,735
Vesting of restricted stock to employees, net of shares withheld of 18,935 to pay taxes |  | 94,971 | 653,308
Vesting of restricted stock to Board of Directors |  | 113,530 | 116,507
Vesting of restricted stock to consultants |  | 1,761 | 9,683
Shares issued for services |  |  | 39,832
Shares, Outstanding, Ending Balance | 55,649,896 | 55,649,896 | 54,568,065
Conversion of preferred stock |  | $ 818,334 |
Issuance of common stock through ATM facilities | 53,235 | 53,235 |

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